Use of Thiazyl Chlorides, Alkyl Carbamates, and Thionyl Chloride To Fuse 1,2,5-Thiadiazoles to Quinones and To Oxidize, Chlorinate, and Aminate Them
摘要:
Thiazyl chlorides in a simple one-step procedure fuse 1,2,5-thiadiazole rings to quinones. So do alkyl carbamates mixed with excess thionyl chloride and pyridine. Evidence is put forward to support the hypothesis that NSCl or a related thiazyl derivative is the reactive species that brings about the transformations. Selenoyl chloride mixed with an alkyl carbamate, pyridine, and quinones similarly gives 1,2,5-selenodiazoloquinones. Thionyl chloride in pyridine chlorinates quinones and oxidizes hydroquinones. 2,3-Dichloro-1,4-quinones with S4N4 or. with alkyl N-sulfinylcarbamates give 1,2,5-thiadiazoloquinones. Quinones and their 2 3-dichloro derivatives with TsNSO in pyridine give betaine derivatives of 2,3-diaminoquinones, which pyrrolidine converts into 2-amino-3(tosylamino)quinones. A unified set of mechanisms is presented that accounts for these transformations.
The title compound was prepared which forms a two-dimensional “ribbon dimer” network by strong Se–Se and Se–N interactions in the crystal.
制备的标题化合物通过晶体中强烈的 Se-Se 和 Se-N 相互作用形成二维“带状二聚体”网络。
Preparation and Properties of Tetrathio-derivatives of Quinodimethanes Fused to a 1,2,5-Thiadiazole Unit and Related Heterocycles
作者:Yoshiro Yamashita、Tsutomu Miyashi
DOI:10.1246/cl.1988.661
日期:1988.4.5
Wittig-Horner reaction of 2-dimethoxyphosphinyl-1,3-benzodithiole with 1,4-benzoquinones fused to a 1,2,5-thiadiazole unit and relatedheterocycles gave a new type of donors which show reversible two-electron oxidation waves and formed conductive complexes with iodine and DDQ.
Solid‐State Assembly by Chelating Chalcogen Bonding in Quinodimethane Tetraesters Fused with a Chalcogenadiazole
作者:Yusuke Ishigaki、Kota Asai、Henri‐Pierre Jacquot de Rouville、Takuya Shimajiri、Johnny Hu、Valérie Heitz、Takanori Suzuki
DOI:10.1002/cplu.202200075
日期:2022.4
p-Quinodimethane tetraesters are labile and transformed into linear polymers by C−C bond formation even in the solidstate whereas ring-annulation prohibits polymerization by inducing butterfly-shaped deformation to reduce the diradical character. It is not the covalent bond but the chalcogenbond that induces formation of one-dimensional rod-like assembly in the crystal of the title molecules, for